Virtual Labs

1. Time-dependent permanent deformation of a material under a constant load is called ____.

a: Elastic deformation Explanation

Explanation

b: Plastic deformation Explanation

Explanation

c: Creep Explanation

Explanation

d: Fatigue Explanation

Explanation

2. Creep is primarily a ____ dependent phenomenon.

a: Temperature Explanation

Explanation

b: Time Explanation

Explanation

c: Density Explanation

Explanation

d: Colour Explanation

Explanation

3. In this virtual experiment, the creep behaviour is demonstrated using a ____ specimen.

a: Steel Explanation

Explanation

b: Copper Explanation

Explanation

c: Lead Explanation

Explanation

d: Aluminium Explanation

Explanation

4. During the creep test, which quantity is kept constant?

a: Load Explanation

Explanation

b: Extension Explanation

Explanation

c: Strain Explanation

Explanation

d: Length Explanation

Explanation

5. Which graph is obtained in the creep test performed in this virtual lab?

a: Stress–Strain Explanation

Explanation

b: Load–Extension Explanation

Explanation

c: Extension–Time Explanation

Explanation

d: Torque–Twist Explanation

Explanation

6. Which property is directly observed during the creep test?

a: Hardness Explanation

Explanation

b: Extension with time Explanation

Explanation

c: Impact energy Explanation

Explanation

d: Shear stress Explanation

Explanation

7. For most engineering metals, creep becomes significant when the operating temperature exceeds approximately ____.

a: 0.1 Tm Explanation

Explanation

b: 0.2 Tm Explanation

Explanation

c: 0.4 Tm Explanation

Explanation

d: 0.9 Tm Explanation

Explanation

8. Which stage of creep is characterised by an approximately constant creep rate?

a: Primary creep Explanation

Explanation

b: Secondary creep Explanation

Explanation

c: Tertiary creep Explanation

Explanation

d: Elastic stage Explanation

Explanation

9. Which expression represents engineering strain?

\varepsilon=\frac{\Delta L}{L}

Explanation

\sigma=\frac{P}{A}

Explanation

E=\frac{\sigma}{\varepsilon}

Explanation

\tau=\frac{T}{J}

Explanation

Creep Test Experiment